Feature/ticketless client tags in query editor

[RotRotAl]

Allows to override the client tags that were set in the data source addition , via the the query editor. Based on pr #309 by @laserninja that allows setting the client tags in the data source addition .

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[RotRotAl]

Cla was accepted waiting for #309 before i can publish this @laserninja @RoeyoOgen

[nineinchnick]

Please squash all commits

[laserninja]

@RotRotAl can you please create a PR with just your changes? We can get this approved https://github.com/trinodb/grafana-trino/pull/309 meanwhile

[RotRotAl]

@laserninja sadly my code based on your changes, i will pull your changes after you finish the cr process

[RotRotAl]

@nineinchnick done replying and fixing, thanks for the cr.

[RotRotAl]

Hi @nineinchnick stil needs second cr 🙏🏻

[RotRotAl]

@nineinchnick still waits for cr

[RotRotAl]

I need it in order to give my “clients” the ability to choose in which cluster there query should be running, i give them only the gateway link and they decide by client tag where will it run. @nineinchnick